on the GABA A receptor and thus represents a potential new lead structure for the discovery of new anxiolytics. Here we present the enantioselective total synthesis of valerenic acid, which departs from natural (R)-pulegone and proceeds through a bicyclic ketone as the central intermediate. Key transformations are the stereoselectivereduction of a 3,4-disubstituted cyclohexenone and a microwave-assisted
缬草酸是缬草根的主要成分。它表现出对 GABA A 受体的调节活性,因此代表了发现新抗焦虑药的潜在新先导结构。在这里,我们介绍了戊烯酸的对映选择性全合成,它与天然 (R)-胡薄荷酮不同,并通过双环酮作为中心中间体进行。关键转化是 3,4-二取代环己烯酮的立体选择性还原和微波辅助的 Wittig 反应。
Synthesis of isovalerenenol, a sesquiterpene alcohol isolated from a soft coral and the stability of related hydrindanone derivatives
hydrogenation reactions of the corresponding hydrindenone derivative. This hydrogenation afforded exclusively one desired product, while the other isomer gave several products, whose structures were determined by spectroscopic methods as well as base treatments. The introduction of α,β-unsaturated aldehyde was accomplished by the Grignard reaction using vinyl magnesium bromide and oxidative allylalcohol rearrangement